Brake valve handle



Sept. 26, 1939. c. s. KELLEY 2,173,943

' BRAKE VALVE HANDLE Filed Aug. 12, 1938 3 Sheets-Sheet l TicgZ 7 X 1 L I47: 26' w 3934 4 I, 45 so 28 I,

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Z9- Z5 32. 3/ 3537 26 4O INVENTOR QEGIL 5. KEl. LE Y ATTORNEY p 939- c. s. KELLEY 2,173,943

BRAKE VALVE HANDLE Filed Aug. 12, 1938 5 Sheets-Sheet 2 86 a7 88 l' I 'L L I."

54 x2 62 6.6 INVENTOR h CECIL SKELLEY ATTORNEY Sept. 26, 1939. c. s. KELLEY BRAKE VALVE HANDLE 3 Shets-Sheet 3 Filed Aug. 12, 1958 INVENTOR CECIL EL KELLEY BY u \ L4 Q W ATTORNEY Patented Sept. 26, 1939 UNITED STATES PATENT OFFICE BRAKE VALVE HANDLE Pa., a corporation of Pennsylvania Application August 12, 1938, Serial No. 224,465

8 Claims.

This invention relates to fluid pressure brakes, and more particularly to an improved handle device for a brake valve device employed in a fluid pressure brake system.

It has been found that, in the operation of trains equipped with air brakes of advanced design, such as the well known Westinghouse E T locomotive brake apparatus, the most satisfactory results are obtained in effecting release of the brakes by operation of the brake valve device to running position only, without operation thereof to the formerly useful release position. While it would be entirely practicable to prevent an engineer of a train from using the release position commonly provided on the locomotive brake valve device, it has been considered preferable to provide means to discourage movement of the brake valve device beyond running position to release position, which means may be forced to yield to permit such movement to release position in the event that circumstances require such operation.

The principal object of my invention is to provide an improved handle for a locomotive brake valve device of the above type, which handle may be substituted for the existing handle employed with standard E T locomotive brake equipments, and which incorporates yielding means adapted to resist movement of the handle beyond running position to release position and effective to return said handle from release position to running position unless the handle is held against the force of the yielding means.

Other objects and advantages of the invention will appear in the following detailed description of several preferred embodiments thereof, taken in connection with the accompanying drawings, wherein Fig. l is an elevational view, partly in section, showing a brake valve handle applied to the quadrant and associated portions of a brake valve device of the class to which my invention relates;

Figs. 2 and 3 are plan views, partly in section, of one form of brake valve handle embodying the invention and disposed in running and release positions, respectively;

Figs. 4 and 5 are similar views of another form of handle embodying the invention;

Fig. 4a is an enlarged detail vertical sectional view of a portion of the handle shown in Fig. 4;

Figs. 6 and 7 are plan views, partly in section, showing still another form of handle embodying the invention;

Figs. 8 and 9, l and 11, and 12 and 13 are paired sectional plan views of still other and different forms of brake valve handles constructed according to the invention, each form of handle being shown in both running and release positions; and

Fig. 14 is a sectional view taken on the line IQ-M of Fig. 12.

Referring to Fig. 1 of the drawings, there is shown a portion of a brake valve device l provided with the usual quadrant l6 and having associated therewith an operating shaft H, which is operatively connected to a rotary valve, not shown. Mounted on the brake valve device i5 is a handle l8 having a vertically disposed socket portion 18a sleeved on the shaft IT. The shaft I1 is provided with a longitudinal groove 19 into Which is fitted a pin 20 secured to the socket portion l8 for preventing relative movement between the handle [8 and the shaft ll. A cap screw 22 may be inserted through the open end of the socket portion Em and into screw-threaded engagement with the shaft ll. It will be understood that each of the forms of the improved brake valve handle embodying my invention and hereinafter described may be mounted on the brake valve device in the manner shown in Fig. 1.

As shown in Figs. 2 and 3 of the drawings, one form of brake valve handle constructed according to the invention comprises a handle 25 having a socket portion 26 fitted on the shaft ll of the brake valve device it, and provided with off-set guard portions 28 disposed adjacent but spaced from the usual quadrant l6 of the brake valve device 45. The handle 25 has formed therein a longitudinal bore 29 in which is slidably mounted a plunger 30 having secured thereto the usual feeler button 3i, which projects laterally through an aperture 32 formed in the handle. The end of the plunger 39 adjacent the brake valve device has formed thereon a spring seat portion 34 and a lug 35, to which lug a latch member 36 is pivotally connected by means of a pin 31.

The latch member 35 is adapted normally to extend in parallel alignment with the axis of the handle 25 and of the plunger 30 under the pressure of a coil spring 39, which is interposed between the latch 36 and the spring seat portion 34 of the plunger for urging the latch member into engagement with a stop portion d0 of the adjacent guard 38, as shown in Fig. 2 of the drawings. The outer end of the latch member 36 has formed thereon a butt portion 42 and a head portion 43 laterally spaced from the butt portion. With the handle positioned as shown in Fig. 2, the head portion 43 is normally held in coaxial alignment with the plunger 30. The head 43 is adapted to ride in sliding engagement with the notched surface of the brake valve quadrant I 6 under the force of a coil spring 45, which is interposed between the inner end of the plunger 30 and the end wall of the bore 29 of the handle 25.

The quadrant l6 of the brake valve device I5 is of the usual type having suitable notches for indicating the several positions of the brake valve device, such as a service position notch 46, a running position notch 41, and a release position notch or stop 48. It will be understood that, with the brake valve device provided with an ordinary handle having a simple spring-pressed pawl or latch engageable in the quadrant notches, all of said notches including the release position notch 48 would be engageable by the springpressed pawl in accordance with movement of the handle into the respective positions of the brake valve device. According to the invention, however, the head 43 of the latch member 35 is adapted for engagement in any of the position notches except the release position notch 48, the butt portion 42 of the latch member being adapted to engage the release notch for resisting movement of the brake valve handle into release position.

It will thus be apparent that as the brake valve handle shown in Fig. 2 is operated to the various positions indicated by the notches, with the exception of the release position notch 48, the latch member 36 and associated plunger 3!! will be displaced against the force of the spring 45 as the head portion 43 overrides the portions of the quadrant [6 between the several notches, this action of the plunger 30 being communicated to the feeler button 3| for enabling the operator to position the handle accurately. During such normal operation of the handle, the spring 39 remains efiective to maintain the latch member 36 in engagement with the stop portion 49 as already explained.

If it is desired to move the brake valve handle beyond running position to release position, as shown in Fig. 3 of the drawings, the operator in so moving the brake valve handle must exert sufiicient force on the handle portion to overcome the pressure of the coil spring 39 acting on the latch member 36, which latch member is at the same time canted in a clockwise direction about the pivot pin 31 due to engagement of the butt portion 42 with the release position notch 48. Upon movement of the brake valve handle to the release position, further movement beyond that position is prevented by engagement of the head portion 43 of the latch member 36 with a stop lug 59 formed on the guard portion 28 of the brake valve handle. It will be noted in Fig. 3 of the drawings, that with the brake valve handle in release position, with the head portion 43 of the latch member in engagement with the stop lug 50, the butt portion 42 of the latch member engaging the release position notch 48 is disposed substantially along the axis of the handle 25, so that the improved brake valve handle embodying my invention occupies exactly the same release position relative to the brake valve device 15 as would an ordinary formerly standard brake valve handle not having the improved construction.

Unless the operator continues to hold the handle 25 in the release position as shown in Fig, 3, the handle will be automatically returned to running position. Thus if the operator withdraws his hand from the handle 25, the spring 39 is rendered eifective to act through the medium of the spring seat portion 34 and the plunger 39 toshift the handle 25 to the running positionas shown in Fig. 2, where the handle will remain until again manually operated.

Referring to Figs. 4 and 5 of the drawings, there is shown a brake valve handle 52 associated with the brake valve device [5, which handle embodies features of the invention already described with certain details of construction somewhat different from those of the handle 25 shown in Fig. 2. The handle 52 has formed therein a longitudinal bore 53 in which is slidably mounted a plunger member 54, the free end of which extends into the space between spaced guard portions 55 and 56 formed on the handle. The plunger 54 is subject to the force of a spring 58 interposed between the inner end of the plunger and the end wall of the bore 53, and is provided with the usual feeler button 59 extending outwardly of the handle 52 through a suitable aperture 60. The free end of the plunger 54 has formed thereon a lug 62 which is adapted for sliding engagement with the inner surface of the guard portion 56 of the handle.

Pivotally mounted on a pin 64 carried by the lug 62 of the plunger is a latch member 65 having a head portion 66 which is adapted for engagement in the various notches of the brake valve quadrant l6, such as the running position notch 41, and a butt portion 67 which is formed on the latch member 65 laterally of the head portion 66. A flange portion 69 formed on the latch member 65 adjacent the pivotal connection thereof with the pin 64 is adapted to engage a flat surface 70 formed on the plunger 54 for preventing misalignment of the latch member in a counterclockwise direction about the pivot pin, while the lateral surface of the latch member is adapted to engage a lug 12 formed on the handle 52 for normally preventing clockwise movement of the latch member about the pin 64.

As shown in Fig. 4a, the latch member 65 has formed in the upper surface thereof a groove 14 adjacent the surface of the latch member normally engaging the lug 12, which groove is adapted to clear the lug upon withdrawal of the plunger 54 through the medium of the feeler button 59 as hereinafter explained, when the handle is to be operated to release position.

A pin 16 is carried on the free end of the plunger 54 adjacent the surface 19 thereof, to which pin is pivotally connected a rod 11 which extends through a suitable aperture 18 formed in the flange portion 69 of the latch member 65. A coil spring 89 is supported by the rod 11 between the flange portion 69 of the latch member and a spring seat 8| secured to the end of the rod, which spring is adapted to urge the flange portion 69 into normal engagement with the flat surface 79 of the plunger member 54 and to resist movement of the latch member 65 in a clockwise direction about the pivot pin 64.

With the associated elements of the handle 52 disposed as shown in Fig. 4 of the drawings, movement of the handle from running position as shown toward the release position is prevented because of the engagement of the butt portion 61 of the latch member 65 with the release position notch 48 of the brake valve quadrant, the latch member *65 being at the same time locked against movement by engagement with the lug 72 of the handle. In order to move the brake valve handle 52 to the release position, the operator may move the feeler button 59 to retract the plunger 54 and the latch member 65 until the groove 14 of the latch member registers with the lug 12 of the handle, whereupon the handle 52 may be moved beyond running position into release position, as shown in Fig. 5. During such movement the latch member 65 is of course canted in a clockwise direction about the pivot pin 54 against the force of the spring 89.

If the operator releases his grip on the handle 52 while it is disposed in release position as shown in Fig. 5, the coil spring 30 is rendered effective through the leverage afforded by the flange portion 69 of the latch member 65 to force the handle 52 out of the release position toward running position, the inertia of the handle 52 being sufiicient to cause the lug I2 thereon to override the wall of the groove I4 of the latch member while the spring 58 is still partially suppressed, so that full movement of the handle to running position is normally effected.

In Figs. 6 and 7 of the drawings, my invention is shown embodied in a brake valve handle 84 having a bore 85 within which is slidably mounted a plunger 89 having an enlarged end 87, which is guided within a guard portion 89 formed on the handle. The handle 84 is provided with a lateral opening 89 through which extends the feeler button 93 carried by the plunger 86.

The enlarged end 81 of the plunger 86 has formed therein an inclined groove 92 within which is fitted a toggle latch member 93, one end of which is pivotally connected by means of a pin 99 to the end 8? within the groove 92. The toggle latch member 93 is normally disposed in a canted position relative to the handle 84, as shown in Fig. 6, and has formed thereon a head portion 95 which is normally positioned along the axis of the plunger 86 and is adapted to engage the running position notch A! and other notches of the brake valve quadrant I6. On the outer end of the toggle latch member 93 is formed a butt portion 91, which is adapted to engage in the release position notch 98 of the brake valve quadrant while the head portion 95 engages in the running position notch 41. The usual coil spring 98 is provided for urging the plunger 86 and latch member 93 toward the brake valve quadrant.

It will be understood that with the toggle latch member 93 positioned as shown in Fig. 6, movement of the brake valve handle 84 out of running position toward release position is resisted by the spring 98 acting through the medium of the plunger 85 and the latch member 93. If the operator exerts sufiicient force on the handle 89, however, the brake valve handle may be shifted to the release position, as shown in Fig. '7. As the handle 34 is thus moved to release position the butt portion 91 of the toggle latch member 93 remains in engagement with the release position stop 98, so that the latch member is caused to turn about the pivot pin 94 in a clockwise direction and at the same time to force the plunger 86 outwardly against the pressure of the spring 98, until a face 99 of the toggle latch member engages the adjacent wall of the guard portion 88, at which time said member is still inclined with respect to the axis of the handle 39.

It will be apparent that so long as the brake valve handleM is held in release position as shown in Fig. 7, the spring 98 continues to exert a force through the medium of a plunger 85 and toggle latch member 93 tending to move the handle back to running position, and that the handle 99 will thus not remain in the release position unless the operator continues to apply positive force thereto for maintaining the spring 98 compressed.

As shown in Figs. 8 and 9 of the drawings, my invention may be embodied in a somewhat modified brake valve handle I00, comprising a handle portion having a bore IDI within which is slidably mounted a plunger I02 having arm portions I93 and I94, which carry feeler buttons I95 and I96, respectively. The arm portion I93 is adapted for sliding engagement with the adjacent wall of a guard portion I08 of the handle I99, and is provided with an enlarged end portion or lug IIEI having formed therein a laterally disposed recess i I I. A latch member I I2 is pivotally connected to the enlarged portion I II] by means of a pin H3, and has formed thereon a spring seat portion I I4 for receiving the end of a coil spring II5 carried by the plunger I92.

The latch member I I2 has formed thereon a head portion II'I adapted for engagement in the various notches of the brake valve quadrant I5, including the running position notch 41, as shown in Fig, 8 of the drawings. A butt portion H8 formed on the latch member H2 is adapted to engage in the usual release position stop 48 of the brake valve quadrant while the head portion II'I engages in the notch 41. The plunger I92 and latch member I I2 are subject to the force of a spring I20 acting on the plunger member within the bore IilI.

If the brake valve handle I09 is moved from the running position as shown in Fig. 8 toward the release position as shown in Fig. 9, the latch member II2, due to engagement of the butt portion H8 in the release position notch #38, is rotated in a clockwise direction about the pivot pin H3, thereby compressing the coil spring H5, which resists such movement beyond the running position. Upon engagement of the head portion III with a lug I2I formed on the handle I99, further movement of the brake valve handle as just explained is stopped. As in the cases of the other embodiments of the invention heretofore described, it will be apparent that the spring H5 is adapted to exert a constant force through the medium of the latch member II2 for urging return of the handle IE!) to running position.

Referring to Figs. 10 and 11, the invention is further illustrated in the form of a brake valve handle I25 having a hollow guard portion I23, within which is disposed a latch member I21 having pivotal connection with the guard portion by means of a pin I28. The latch member I2? is provided with a flat lateral surface I39 adapted for engagement with the inner wall of the guard portion I29, and has formed therein a longitudinal bore I3I, which is disposed in parallel alignment with the surface I39 and is adapted to be positioned in coaxial alignment with the handle I25 as shown in Fig. 10. A plunger I33 is slidably fitted within the bore I3I or" the latch member I21 and is adapted to engage in the running position notch 4'! and other notches of the brake valve quadrant I3 under the force of a coil spring I 34 that is disposed within the bore I3I. A butt portion I35 is provided on the latch member I21 for engaging the release position stop or notch 58 when the head of the plunger I33 engages in the running position notch il, as shown in Fig. 10.

A laterally projecting lug I38 is formed on the latch member I21 and carries a pin I39 to which is pivotally connected a link I49, which is disposed on an angle with respect to the axis of the handle I25. The end of the link M9 opposite the pin I39 is pivotally connected to a pin I42 carried on a plunger M3 that is slidably mounted in a bore I44 formed longitudinally in the handle I25. A coil spring I45 is disposed in the bore I44 and acts through the medium of the plunger I43 and link I40 to maintain the latch member I21 in the normal position shown in Fig. 10.

With the elements of the brake valve handle I25 disposed in their normal positions as shown in Fig. 10, as the brake valve handle is operated, in controlling the air brakes, through the usual range of positions, with the exception of release position, the plunger I33 is pressed under the force of the spring I34 into engagement in corresponding position indicating notches of the brake valve quadrant I6, thus permitting operation of the brake valve device in the usual manner.

In order to move the brake valve handle I25 beyond the running position as shown in Fig. 10 and into release position, as indicated in Fig. 11, the operator must apply such additional force to the handle as is required to overcome the force exerted by the coil spring I45 through the medium of the plunger I43, link I40 and latch member I21, the butt portion I35 of which is at this time fulcrumed at the release position notch 48. As the handle I25 is thus moved beyond running position into release position, the butt portion I35 of the latch member I31 is held against movement due to its engagement with the release position notch 48, while the portion pivotally connected to the pin I28 is carried toward the position shown in Fig. 11, the latch member I21 being consequently tilted about the pin I28 in a clockwise direction so as to move the link I40 and plunger I43 outwardly against the force of the spring I45. The plunger I43 is at the same time shifted out of engagement with the running position notch 41. Movement of the brake valve handle I25 beyond the release position is prevented by engagement of the lug I38 with a stop portion I41 formed on the handle, at which time the butt portion I35 of the latch member I21 is disposed substantially along the axis of the handle According to the invention as embodied in the structure shown in Figs. 12 and 13 of the drawings, a brake valve handle I50 is provided in association with the brake valve device including the usual quadrant I6, these parts being shown in fragmentary form in order to permit their illustration in enlarged detail views.

The brake valve handle I50 has formed thereon, adjacent the brake valve quadrant IS, a guard portion including flanges I5I and I52, between which is disposed a carrier member I53 having one end pivotally connected by means of a pin I54 to lugs I55 carried by the flange I5I. The pin I54 is vertically disposed, so that the carrier member I53 is movable in the same plane of movement of that of the brake valve handle I50. Interposed between the handle I50 and an arm portion I58 projecting laterally from the carrier member I53 is a coil spring I59, which is adapted to urge the carrier member into a normal position in engagement with a stop shoulder I60 formed on the flange I5I, as shown in Fig. 12. For preventing movement of the carrier member I53 out of the normal position there is provided a vertically disposed pin I62 having a head I63, which pin is adapted to be removably inserted in suitable bores formed in a web portion I65 and a lug I66 carried by the handle I50, as shown in Fig. 14 of the drawings. With the pin I62 in place, movement of the carrier member I53 out of the position shown in Fig. 12 is blocked.

A butt portion I68 of the carrier member I53 projects beyond the stop shoulder I60 of the brake valve handle and is adapted to engage the usual release position notch 40 formed in the brake valve quadrant I6 upon movement of the brake valve to running position as shown in Fig. 12 of the drawings. A latch member I10 is pivotally connected by means of a pin I1I to the butt portion I68 of the carrier member and has formed on the free end thereof a head portion I12, which is adapted to be urged inwardly toward the brake valve quadrant under the force of a coil spring I13 interposed between the head portion and a suitable cavity I14 formed in the arm I58 of the carrier member I53. With the carrier member I53 held in the normal position as shown in Fig. 12, the head portion I12 of the latch member I10 is disposed along the longitudinal axis of the brake valve handle I50, and is adapted for engagement in the various position notches of the brake valve quadrant I6, such as the running position notch 41.

It will thus be understood that, with the elements of the brake valve handle I50 disposed as shown in Fig. 12 and with the pin I02 in place as shown in Fig. 14, operation of the brake valve handle may be effected in the usual manner for controlling the brakes, movement of the brake valve handle to release position, however, being prevented by reason of blocking engagement of the carrier member I53 with the pin I62 as already explained.

If it is deemed necessary to move the brake valve handle I50 beyond running position into release position, the pin I52 may be withdrawn from its normal position in the handle and out of the path of movement of the carrier member I53, after which the brake valve handle I50 may be turned into the release position, as shown in Fig. 13. At the same time, the coil spring I59 becomes effective to resist such movement of the handle to release position, as the carrier member I53 is caused to turn in a clockwise direction with relation to the pin I54, due to the engagement of the butt portion I68 with the release position notch 48 of the brake valve quadrant I6. As hereinbefore explained in connection with the other embodiment of the invention, the operator must continue to hold the brake valve handle I50 in release position for the desired interval, since the spring I59 exerts a constant pressure against the carrier member I53 tending to actuate the carrier member to return the handle to running position.

From the foregoing description of various alternative designs of brake valve handle embodying my invention, it will be observed that such a handle may be substituted for the existing or formerly standard type of brake valve handle associated with the usual brake valve device, and that my improved handle may then be operated in the usual manner to control application and release of the brakes, but subject to the condition, that movement of the handle to the now disfavored release position is automatically opposed by a yielding means, which is adapted to effect return movement of the handle to running position when the handle is released.

While I have described several embodiments of the invention in detail, it will be understood that I do not wish to limit its scope to those embodiments or otherwise than by-,the terms of the appended claims.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. An operating handle for a brake valve device of the class including a quadrant having notches indicating various brake valve positions such as adjacent running and release positions, said handle comprising a yieldingly mounted member, a latch member pivotally connected to said member and adapted to engage said quadrant notches under a normal pressure in all positions of the handle other than release position, and spring means cooperative with said latch member for resisting movement of the handle beyond running position into release position with greater than normal pressure.

2. An operating handle for a brake valve device of the class including a quadrant having notches indicating various brake valve positions such as adjacent running and release positions, said handle comprising a spring-pressed member, a latch element pivotally connected to said member and having a head engageable with said running position notch and a butt portion adjacent said head, and spring means yieldingly positioning said latch element to effect engagement of said butt portion with said release position notch upon movement of said handle beyond running position toward release position, said latch element being displaced, during such movement to release position, against the opposing force of said spring means.

3. An operating handle for a brake valve device of the class including a quadrant having notches indicating various brake valve positions such as adjacent running and release positions, said handle comprising a grip portion having a longitudinal bore, a plunger slidably mounted in said bore, spring means, a latch member associated with said plunger and having a portion adapted for rocking engagement with said release position notch upon movement of said handle beyond running position toward release position, and a hinge pin pivotally connecting said latch member to the free end of said plunger, through the medium of which pin the latch member is canted against the opposing force of said spring means upon movement of said handle to release position.

4. In an operating handle for a brake valve device having a notched quadrant including a stop shoulder indicating a terminal position, in combination, a hollow guard portion carried by the handle and having a stop lug, a member operatively mounted within said guard portion and movable toward and away from said quadrant, a latch element pivotally connected to said movable member for normally yieldingly engaging said quadrant and having an ofiset butt portion movable with the handle in a direction toward, said terminal position into rocking engagement with said stop shoulder on the quadrant, said latch element being thereby conditioned for r0- tation about the pivotal connection with the movable member into locking engagement with said stop lug on the guard portion to prevent movement of the handle beyond said terminal position, and spring means carried by said handle for resisting rotation of said latch element during movement of said handle to said terminal position.

5. An operating handle adapted to be mounted on a brake valve device provided with a notched quadrant having a stop portion indicating a ter-.-

minal position, said handle including a guard portion having an interior lug, a plunger slidably mounted in said handle, a spring urging said plunger toward said quadrant, a latch element pivotally connected to said plunger and adapted to engage said quadrant stop on movement of the handle in one direction, said latch element being normally locked against said interior lug to block movement of the handle to said terminal position, and means for manually actuating said plunger against the force of said spring to cause the latch element to clear said interior lug for permitting movement of the handle to said terminal position.

6. An operating handle adapted to be mounted on a brake Valve device provided with a notched quadrant having a stop portion indicating a ter minal position, said handle including a guard portion having an interior lug, a plunger slidably mounted in said handle, a spring urging said a interior lug, and a spring opposing pivotal movement of said latch element relative to said plunger as the handle is moved to said terminal position.

'7. An operating handle for a brake valve device provided with a notched quadrant having a stop portion indicating a terminal position, said handle including a guard portion, a plunger slidably mounted therein, a spring urging said plunger inwardly toward said quadrant, and a toggle latch element having one end pivotally connected to said plunger and the other or free end adapted to engage said stop portion of the quadrant when the handle is moved toward said terminal position, said toggle latch element being normally disposed on said plunger at an angle with said free end thereof inclined toward said stop portion of the quadrant so that, upon engagement of said end portion and stop portion, continued movement of the handle into the terminal position effects turning of said toggle latch element and consequent outward movement of said plunger against the force of said spring.

8. An operating handle for a brake valve device provided with a notched quadrant having a stop portion indicating a terminal position, said handle including a guard portion, a plunger yieldably mounted therein and having a lug, a latch element pivotally connected to said plunger and adapted to rotate into engagement with said guard portion, a spring interposed between said plunger and said latch element for normally positioning the latter in engagement with said lug, in which position said latch element is adapted to cooperate with said quadrant for defining different positions of the handle, and a butt portion formed on said latch element and adapted to engage said stop portion of the quadrant upon movement of the handle to a position adjacent the terminal position, whereby upon continued movement of the handle to said terminal position said spring becomes eiTective to resist rotation of said latch element with a force tending to move the handle out of said terminal position.

CECIL S. KELLEY. 

